Fixed buffer scrolling to begin/end

git-svn-id: http://farmanager.com/svn/trunk@9606 72235d2c-c60c-0410-a47a-a0032694dc5d
тест

git-svn-id: http://farmanager.com/svn/trunk@9608 72235d2c-c60c-0410-a47a-a0032694dc5d
VMenu fix

git-svn-id: http://farmanager.com/svn/trunk@9609 72235d2c-c60c-0410-a47a-a0032694dc5d
windowmode scrollbar fix

git-svn-id: http://farmanager.com/svn/trunk@9611 72235d2c-c60c-0410-a47a-a0032694dc5d